[LeetCode][Java]Same Tree
https://leetcode.com/problems/same-tree/
Same Tree
Given two binary trees, write a function to check if they are equal or not.
Two binary trees are considered equal if they are structurally identical and the nodes have the same value.
1 /** 2 * Definition for binary tree 3 * public class TreeNode { 4 * int val; 5 * TreeNode left; 6 * TreeNode right; 7 * TreeNode(int x) { val = x; } 8 * } 9 */ 10 public class Solution { 11 public boolean isSameTree(TreeNode p, TreeNode q) { 12 if(p == null && q == null){ 13 return true; 14 } 15 if(p == null && q != null || q == null && p != null || p.val != q.val){ 16 return false; 17 } 18 19 return isSameTree(p.left, q.left) && isSameTree(p.right, q.right); 20 } 21 }
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